Certkiller.com has servers on the main network that run Windows Server 2008. It also has two domain controllers. Active Directory services are running on a domain controller named CKDC1. You have to perform critical updates of Windows Server 2008 on CKDC1 without rebooting the server. What should you do to perform offline critical updates on CKDC1 without rebooting the server（）

• A、Start the Active Directory Domain Services on CKDC1
• B、Disconnect from the network and start the Windows update feature
• C、Stop the Active Directory domain services and install the updates. Start the Active Directorydomain services after installing the updates.
• D、Stop Active Directory domain services and install updates. Disconnect from the network and then connect again
• E、None of the above